We can implement a security captcha image into our own plugin using Really Simple Captcha plugin. See the example explained in the following link, how to use the Really Simple Captcha Plugin with our own WordPress plugin Implementation of captcha image into your own plugin using Really Simple Captcha plugin.
Recommend you just stick to * and +, not expect people to deal with decimals and negative numbers. It is best to keep it simple as possible and not attempt to eval the string as an expression which is not good practice: $operators = array(‘+’, ‘*’); $operator = rand(0, 1); $display = $number1.’ ‘.$operators[$operator].’ ‘.$number2; … Read more
Actually there are a lot of solution for this. Simply a google could answer you the whole. And also WordPress plugin repository could help you. But to pinpoint, you can use Plugins easily. Try anyone of them: Captcha — WordPress plugin SI CAPTCHA Anti-Spam — WordPress plugin more… And also, Akismet is a very good … Read more
Adding Re Captcha to your site [closed]
No, it’s not an overkill to use honeypot and captcha together for the same form. Why? They both use different approach: Honeypots are targeted towards bots falling for common rules. Captchas are targeted towards humans passing rules. Why have Honeypots: When set up correctly, they’ll protect you against wholesale spam bots. It means it’ll automatically … Read more
My favorite captcha plugin is reCaptcha. The captcha images are scans from old, damaged books. A computer identifies possibilities with OCR, then the user, in correctly filling out the captcha, confirms it. It helps digitize whole books this way. It’s an initiative by Google. Read about them on their website.